| Autor: |
Denoyelle, J., Waelkens, C., Cuypers, J., Degryse, K., Heynderickx, D., Lampens, P., Poedts, S., Polfliet, R., Rufener, F., Smeyers, P., Abeele, K. |
| Zdroj: |
Astrophysics and Space Science; July 1990, Vol. 169 Issue: 1-2 p109-111, 3p |
| Abstrakt: |
Precise photometric observations of stars in the double cluster h and ? Persei reveal a large spread in the colours and magnitudes of the upper Main-Sequence; half of the stars are variables that are Be stars or related stars. The reported age difference between both clusters is found to be spurious. Rotation apparently affects both the intrinsic and the observed colours of the early-type stars in h and ? Persei. This result questions the validity of photometric calibrations that heavily rely on h and ? Persei or similar clusters. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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